package com.example.servletdemo.filter.test;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

//@WebFilter(urlPatterns = "/*",dispatcherTypes = DispatcherType.REQUEST)
public class FilterDemo  implements Filter {
    private static final String TAG = "FilterDemo";

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println(TAG+" 初始化");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println(TAG+" 执行");
        filterChain.doFilter(servletRequest,servletResponse);
        System.out.println(TAG+" 继续执行");
    }

    @Override
    public void destroy() {
        System.out.println(TAG+" 销毁");
    }
}
